Typewriter attachment



6 A. MARCELLUS- TYPEWRITER ATTACHMENT May 27, 1930.

Filed Jan. 14. 1928 2 Sheets-Sheet 1 lium-H1 01 1/9 Marcel Zws May27, 1930. I A MARCE LUS 1,760,366

TYPEWRITER ATTACHMENT Filed Jan. 14, 1928 2 Sheets-Sheet 2 la-Marcellus Q 61 fl er/11 0134 Patented May 21,1930

AARON'MABCELLUS, F BALLSTON LAKE, NEW YORK TYPEWBITER ATTACHMENT Application filed January 14, 1928. Serial No. 246,73 2.

The present invention is directed to improvements in signaling attachments for typewriters, and has for its primary object to provide a device of this character so construoted that it can be conveniently attached to a standard typewriter in order that the operator will be notified by an audible signal when the lower edge of the letter sheet has reached a predetermined position, whereby the last lines typed will be uniformly printed.

Another object of the invention is to provide a device of this character wherein the signal will be positively maintained inactive when subjected to jars incident to the shift 1 ing of the carriage.

With these and other objects in view, this invention resides in the novel features of construction, formation, combination and arrangement of parts to be hereinafter more fully described, claimed and illustrated in the r accompanying drawing, in which,-

Figure 1 is a perspective view of the device.

Figure 2 is a sectional view on the line 2-2 of Figure 1.

Figure 3 is a lan view of a dummy sheet.

Figure 4 is a ragmentary plan view showing the gong in its inoperative position.

igure 5 is an enlarged fragmentary end view.

Fi ure 6 is a fragmentary end View with the s aft removed.

Referring to the drawing, the numeral 1 designates the paper rest which, as usual, is supported by side frames 2 and 3, said rest 35 having a vertically disposed open-ended slot 4 formed therein, th purpose of which will be later explained. Fixed to the upper edge of the frame 2 1s a plate 5 provided with a 4 I longitudinally split resilient sleeve to provide 0 a clasp 6, there being a similar plate 7 fixed to the frame 3 and also provided with a resilient clasp 8. The plate 7 is provided with a sheet metal bracket 9 which is disposed vertically and upon which is mounted a gong 10. This bracket isprovided with an offset 11 having a stud 12 and to which is pivotally connected the stem 13, said stem having upon its lower end a gong striker 14. The upper end of the stem terminates in an angular arm 15, the purpose of which will appear later.

The upper end of the offset 11 has a pin 15 carried thereby and to which is pivotally connected an arm 16, the upper terminal of which terminates in a finger 17, while the lower end is provided with a loop 18.

A shaft 19 is employed and has its ends formed with cranks 20 and 21 for pivotally and detachably engaging the clasps 6 and 7, said shaft being provided intermediate its ends with a tongue 22 adapted to cooperate with the slot 4 to sound the alarm in a manner to be hereinafter described.

The crank 21 terminates in a downwardly extending arm 23 atone end, the lower end of which is provided with a horizontally disposed yoke 24, the arms 25 thereof being adapted to engage the striker 14 to normally hold the same from swinging toward the gong 10.

It will be apparent that when the paper sheet 21' is engaged with the paper rest the tongue 22 will be prevented from entering the slot 4, but will drop therein when the lower 7 end of the paper sheet passes from engagement with the tongue, thus permitting the shaft 19 to rock in order that the arm 23 will swin rearwardly, thus withdrawing the arm 25 o the yoke from engagement with the striker to permit the same to swing and strike the gong to sound the alarm to indicate that the lower edge of the paper has reached a predetermined position. When a sheet of paper 1s again placed upon the rest the tongue will be raised, thus rocking the shaft 21 to swing the 'arm 23 forwardly, whereupon the arm 25 will engage the striker to swing the same away from the gong.

When addressing envelopes or cards the shaft 19 is removed from the clasp, which releases the finger 17 and permits the loop 18 to swing in the path of movement of the stem 13, as shown in Figure 6, thus holding the striker 14 from contacting with the gong 10. This is desirable since when the'carriage is shifted sharply and is arrested in its movement, the shock incident thereto would sound the alarm, which would be undesirable.

In Figure 3 is shown a dummy sheet of paper 26, which has a strip of stiffer paper 27 upon its edge,

and this paper or sheet is used in connection with the usual letter sheet 21' in order that the lower edge of the sheet 21' will be permitted to travel further upwardly with the laten 28 before the alarm is sounded.

Having thus described the invention, I claim:

'1. The combination with the paper rest of a typewriter, of a shaft pivotally supported by t e typewriter and having a tongue carried thereby, the paper rest having a slot therein, a gong, a gong striker urged to striking osition, means carried by the shaft for holding the striker inactive when a letter sheet is en aged between the tongue and paper rest, an?! releasable to sound the alarm when the letter sheet passes from engagement with the tongue and the tongue enters the slot.

2. The combination with the paper rest of a typewriter, of a shaftpivotally and detachably connected thereto and having a tongue carried thereby, a bracket carried by the typewriter and having'a gong carried thereby, astem pivotally connected with the bracket and having a ong striker upon its lower end, said gong stri er being urged to striking position,

said shaft having an arm carried by one end thereof and having its lower end provided with a yoke, one arm of said yoke being adapted to engage the gong striker to hold the same inactive, said yoke being operable to release the gong striker when a letter sheet passes from engagement with the tongue.

3. The combination with the paper rest of a typewriter, of a shaft pivotally supported thereby and having an arm carried thereon, said paper rest having a slot formed therein, a bracket carried by the typewriter and having a gong mounted thereon, a stem pivotally connected with the bracket and having a gong striker upon its lower end, said gong striker being urged to striking position, said arm having a yoke carried thereby for normally engaging the striker to hold the same inactive, a tongue carried by the shaft, said tongue being maintained out of engagement with the slot when a letter sheet is engaged between the paper rest and the same, said tongue being permitted to enter the slot to permit the shaft to rock to cause the yoke to release the gong striker when a letter sheet disengages the tongue. 4. The combination with the paper rest of a typewriter, of a shaft pivotally and removably supported by the frame of the typewriter, means carried by the shaft for holding the same against rocking movement when a letter sheet is engaged with the paper rest, a gong supported by the typewriter, a striker pivotally connected with the typewriter and urged to striking position, means carried by the shaft for normally holding the striker inactive, said means being releasable to permit the striker to contact with the gongwhen a letter sheet disengages the first named means,

and means for holding the striker inactive when the shaft and its holding means is removed.

In testimony whereof I aifix my signature.

AARON MAROELLUS. a 8. 

